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M87C257-10C7X Datasheet(PDF) 6 Page - STMicroelectronics |
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M87C257-10C7X Datasheet(HTML) 6 Page - STMicroelectronics |
6 / 13 page Symbol Alt Parameter Test Condition M87C257 Unit -90 -10 -12 -15/-20 Min Max Min Max Min Max Min Max tAVQV tACC Address Valid to Output Valid E = VIL, G = VIL 90 100 120 150 ns tAVASL tAL Address Valid to Address Strobe Low 7 777 ns tASHASL tLL Address Strobe High to Address Strobe Low 35 35 35 35 ns tASLAX tLA Address Strobe Low to Address Transition 20 20 20 20 ns tASLGL tLOE Address Strobe Low to Output Enable Low 20 20 20 20 ns tELQV tCE Chip Enable Low to Output Valid G = VIL 90 100 120 150 ns tGLQV tOE Output Enable Low to Output Valid E = VIL 40 40 50 60 ns tEHQZ (2) tDF Chip Enable High to Output Hi-Z G = VIL 0400 30040040 ns tGHQZ (2) tDF Output Enable High to Output Hi-Z E = VIL 0400 30040040 ns tAXQX tOH Address Transition to Output Transition E = VIL, G = VIL 0 000 ns Notes: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP. 2. Sampled only, not 100% tested. Table 8B. Read Mode AC Characteristics (1) (TA = 0 to 70 °C, –40 to 85°C, –40 to 105°C or –40 to 125°C; VCC = 5V ± 5% or 5V ± 10%; VPP = VCC) AI00931 tAXQX tEHQZ DATA OUT A0-A14 E G Q0-Q7 tASLAX tGHQZ tGLQV tELQV VALID Hi-Z tAVQV tASLGL tASHASL tAVASL ASVPP Figure 5. Read Mode AC Waveforms 6/13 M87C257 |
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